Analysis of the planetary distribution in the F – R_p plane and the flux cumulative distribution function. Left panel: distribution of the 1527 planets of the S₁ set in the F – R_p plane. The yellow triangles represent planets that would be referred to as hot Neptunes according to the limits obtained by Mazeh et al. (2016). The grey triangle is a qualitative representation of the desert. Right panel: cumulative distribution function of incident flux values F of planets with 3 R_⊕ ≤ R_p ≤ 11 R_⊕. The vertical dashed line in both panels represents the threshold value of 200 F_⊕ below which lie 75% of the planets with 3 R_⊕ ≤ R_p ≤ 11 R_⊕.